Michael Strauss c03d770c0b drm/amd/display: Attempt to avoid empty TUs when endpoint is DPIA ... [WHY] Empty SST TUs are illegal to transmit over a USB4 DP tunnel. Current policy is to configure stream encoder to pack 2 pixels per pclk even when ODM combine is not in use, allowing seamless dynamic ODM reconfiguration. However, in extreme edge cases where average pixel count per TU is less than 2, this can lead to unexpected empty TU generation during compliance testing. For example, VIC 1 with a 1xHBR3 link configuration will average 1.98 pix/TU. [HOW] Calculate average pixel count per TU, and block 2 pixels per clock if endpoint is a DPIA tunnel and pixel clock is low enough that we will never require 2:1 ODM combine. Cc: stable@vger.kernel.org # 6.6+ Reviewed-by: Wenjing Liu <wenjing.liu@amd.com> Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com> Signed-off-by: Michael Strauss <michael.strauss@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>		2024-06-19 14:17:25 -04:00
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amdgpu_dm	drm/amd/display: prevent register access while in IPS	2024-06-19 14:17:25 -04:00
dc	drm/amd/display: Attempt to avoid empty TUs when endpoint is DPIA	2024-06-19 14:17:25 -04:00
dmub	drm/amd/display: Expand dmub_cmd operations	2024-04-16 21:25:37 -04:00
include	drm/amd/display: Remove redundant include file	2024-04-26 17:22:44 -04:00
modules	drm/amd/display: Check index msg_id before read or write	2024-04-26 17:22:43 -04:00
Kconfig	drm/amd/display: use ARCH_HAS_KERNEL_FPU_SUPPORT	2024-05-19 14:36:19 -07:00
Makefile	drm/amd/display: Refactor DPP into a component directory	2024-03-20 13:37:37 -04:00